Indium (In) Ingots for Fabricating Battery Anode Li-In Alloy, 25-100 g/pack, CBAAII

For High-Temperature Metallurgical Melt Method to fabricate the Li-In alloy, an ingot is ideal because you can cleanly slice and weigh the target stoichiometric mass into a tantalum or molybdenum crucible before melting it with lithium at 350°C to 400°C. 

The basic fabrication procedures are shown below: (1) Stoichiometric Calculation: Weigh high-purity lithium granules and indium ingots matching your exact targeted atomic ratio. For the standard reference phase (LiIn), use a strict 1:1 molar ratio (5.7 wt% Li and 94.3 wt In). (2) Crucible Selection: Place the metals inside a tantalum, molybdenum, or glassy carbon crucible. Critical Warning: Do not use conventional quartz, alumina (Al2O3), or silica crucibles. Molten lithium is extremely corrosive and will violently reduce these materials at high temperatures, ruining both the sample and the vessel. (3) Thermal Profiling: Seal the crucible inside a quartz tube under a high-purity argon atmosphere or a high vacuum. Heat the mixture to 350°C to 400°C—well above the melting points of indium (156.6°C) and lithium (180.5°C). Hold at this plateau for 2 to 4 hours to ensure complete convective and diffusional mixing of the liquid phase. (4) Quenching & Processing: Quench or furnace-cool the tube to room temperature. The resulting intermetallic compound is inherently brittle. Transfer it back into the glove box, where it can be easily crushed into a fine powder using a mortar and pestle or an agate ball mill. (5) Anode Composite Compaction: Blend the synthesized Li-In alloy powder with the solid electrolyte powder (e.g., a 70:30 weight ratio of alloy to electrolyte) to extend the three-dimensional ionic/electronic contact networks, then co-press it with the pure separator layer inside your testing die.